JPS62151167A - Sterilization of thermally coagulating fluid and apparatus for continuous sterilization of said fluid - Google Patents

Abstract

PURPOSE:To carry out a treatment such as thermal sterilization, disinfection, inactivation of enzyme, etc., of a fluid containing proteins and starches such as liquid egg, raw material of a fish paste product, etc., without causing coagulation of the fluid, by heating the fluid with a microwave heater for a short time, keeping at the temperature over a specific interval and quickly cooling the product. CONSTITUTION:A thermally coagulating fluid is quickly heated at a temperature above a level to initiate the coagulation of the fluid by an apparatus composed of a preheating apparatus 1, a microwave heater 2, a retaining apparatus 3 to retain the fluid at a coagulation initiation temperature in a state before or immediately before the start of coagulation, a vacuum vessel apparatus 10 to rapidly decrease the fluid temperature by the heat of evaporation and a cooling apparatus 7. The above apparatuses are connected with each other via pipes 11.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is useful for heat sterilization, sterilization, and enzyme inactivation of fluids containing proteins and starches, such as liquid eggs and raw materials for fish paste products, which have the property of coagulating with heat. The present invention relates to a method for sterilizing thermally coagulable fluids without coagulating them, and a continuous sterilizer for the same fluids.

[Problems to be solved by the prior art and the invention] It depends on the relationship between the temperature and the time during which the fluid, such as the above-mentioned liquid eggs and raw materials for fish paste products, is exposed to a temperature higher than the temperature at which solidification begins. Become a Buddha.

On the other hand, when it comes to sterilization and enzyme inactivation by heat, the effect progresses in relation to the temperature for 9 hours after exposure to a temperature higher than the temperature at which the effect occurs.

Note that the relationship between these temperatures and times differs depending on the components of the fluid to be coagulated and the types of microorganisms and enzymes to be sterilized.

Therefore, there are combinations of temperature and time that allow sterilization to be achieved without substantially progressing the coagulation of the fluid.

However, in order to carry out such processing with high precision, it is necessary to quickly raise the fluid to a predetermined temperature and then quickly lower it after a certain period of time has elapsed. Until now, a thermal method that enables the rapid temperature rise necessary to realize this treatment has not been put into practical use, and the aim is to perform heat sterilization without solidifying a thermocoagulable fluid. There was no sterilization equipment available.

[Means for solving problems]

The present invention uses a microwave heating device to sterilize fluids that coagulate due to heat, heats them for a short period of time, holds them for a certain period of time, and then cools them rapidly. This was in response to the demand for thermal sterilization, sterilization, and enzyme deactivation of driftwood without solidifying fluids containing starch.

〔Example〕

The first embodiment shown in FIG. 1 includes a preheating device (1) that heats the fluid to the highest possible temperature that is not related to solidification, and a microwave heating device (2) that rapidly raises the fluid to a temperature above the temperature at which solidification begins. a holding device (3) that holds the fluid at a temperature state at which it begins to solidify until just before or even before solidification actually begins; A vacuum container device C1l that absorbs heat and rapidly lowers the temperature to a temperature not related to solidification, and a cooler (7) that further lowers the temperature to a temperature suitable for packaging are connected in the listed order by a pipe Uυ. be. In addition, the above-mentioned vacuum container device holder is a vacuum container (
5), a pressure control device (4), a vacuum generation system (6) for maintaining negative pressure inside the vacuum container (5), and a pump (9).
) and is composed of many.

The second embodiment shown in FIG. 2 also includes a preheating device (1) that heats the fluid to a temperature as high as possible that is not related to solidification;
A microwave heating device (2) that rapidly raises the fluid to a temperature above the temperature at which solidification begins, and a holding device (3) that maintains the temperature state at which the fluid begins to solidify until just before or before solidification actually begins. ) and a scraping type heat exchanger (8) driven by a motor α2 that rapidly cools the fluid below a temperature not related to solidification are connected to the listed pipe through a pipe αV.

[For production]

Since the present invention is as described above, according to this, the above-mentioned fluid is rapidly raised to a temperature at which solidification begins by means of a microwave heating device, and after being maintained for a predetermined time, is rapidly cooled and then heated to a temperature of 5r6. In this process, bacteria and enzymes are deactivated.

〔Effect of the invention〕

The present invention enables heat sterilization, sterilization, enzyme deactivation, etc. of fluids containing proteins and starches such as liquid eggs and raw materials for fisheries products, and it is possible to completely achieve the intended purpose. It has excellent effects.

[Brief explanation of drawings]

The figures show the implementation sequence of the present invention, and FIG.
Overall system diagram showing the embodiment. FIG. 2 is an overall system diagram showing the second embodiment. (1) Preheating device, (2) Microwave heating device, (3) Holding device, (4) Pressure control device, (5) Vacuum container, (6 )...Vacuum generation system, (7)...Cooler, (8)...Heat exchange device, (
9)...pump, unit [...vacuum container device, aυ...
・Pipe line, 0z...motor.

Claims (1)

[Claims] 1. A step of rapidly raising the fluid to a temperature above the point at which solidification begins, using a microwave heating device, and a step of maintaining the temperature state until just before or before the start of solidification; A method for sterilizing a thermocoagulable fluid, comprising the step of rapidly cooling the fluid to a temperature not relevant to solidification immediately after the point in time. 2. A preheating device that heats the fluid to a temperature as high as possible that is not related to solidification, a microwave heating device that rapidly raises the fluid to a temperature above the temperature at which solidification begins, and a preheating device that heats the fluid to a temperature above the temperature at which solidification begins, and a temperature state where the fluid starts to solidify just before solidification actually begins. or a holding device that holds the fluid until a point earlier than that, and a holding device that releases the fluid into a vacuum to evaporate the moisture, thereby removing the heat of vaporization from the fluid and reducing its temperature to a temperature not related to solidification immediately after the above point. 1. A continuous sterilizer for thermocoagulable fluid, comprising: a vacuum container that rapidly descends into a vacuum container; a preheating device, a microwave heating device, a holding device, and a conduit connecting the vacuum containers in the listed order. 3. A preheating device that heats the fluid to the highest possible temperature that is not related to solidification, a microwave heating device that rapidly raises the fluid to a temperature above the temperature at which solidification begins, and a preheating device that heats the fluid to a temperature above the temperature at which solidification begins, and a temperature state where the fluid starts to solidify just before solidification actually begins. or a holding device that holds the fluid up to a point before that point, a heat exchange device that rapidly cools the fluid to a temperature not related to solidification immediately after that point, and a preheating device, microwave heating device, holding device, heat A continuous sterilizer for thermocoagulable fluid, comprising: a pipe line connecting exchange devices in the listed order.